Drier.



B. S. HARRISON.

DRIER. 7 APPLICATION FILED MAY 4, 191.5.

Patented July 11, 1916.

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B. I APPLICATI DRIER. I

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um s. HARRISON, OF BROOKLYN, NEW YORK.

DRIER.

Specification of Letters Patent. Patented July 11, 1916.

Application filed May 4, 1915. Serial No. 25,690.

erence being had therein to the accompanying drawing.

My invention relates to improvements in driers and the object of my invention is to provide a simple, convenient and efficient device for drying vegetable products and the like. I accomplish this object by the device illustrated in the accompanying drawings, in which- Figure 1 is a view of the device with parts broken away, Fig. 2 is a View of the tray, Fig. 3 is a view of a section of the device, and Fig. 1 is a detail of the caster.

Similar characters refer to similar parts throughout the several views.

My improved device comprises a cylindrical case or shell 1 provided on its inner face with an outer spiral track 2, preferably con structed of angle iron. A corresponding angle iron inner track 3 is carried by upright supports 4, 1 forming a core for said spiral track arranged about the axially disposed shaft 5 which carries a plurality of fans 6, 6. Above each of the fans 6 I provide a horizontal baffle plate 7 and below each of the fans'6 I provide a bell or air duct 8. On the side of the case 1 I provide a brake device comprising friction rollers 9, 9 set in the plane of the trays 17 carried by a shaft 10 and adjustable in apertures in the case 1 by means of a bearing plate 11 which is hinged at one end section 12 to retaining means 13 on the case land is caused to bear upon the trays 17 by means of a spring 15 arranged between the plate 11 and the head 16. My improved trays 17 are sectors of a circle and are preferably provided with a floor of wire mesh 18 arranged upon a frame 19, 19. I also provide upon the trays 17 a coupling 20 to hold them in position. On the underside of the trays 17 I provide three casters 21 set at an angle of 415 to the plane of the tray by means of the off-set bearing 22. My device being thus assembled, the trays 17 carrying the material to be dried, are fed into the device upon the tracks 1 and 2 at the charging aperture 23 and pass downwardly along the said tracks, by gravity, until engaged by the upper friction roller 9. The trays are then moved along the tracks by rotating the friction wheels '9 bearing against the :sides of the said trays. The said wheels 9 are preferably rotated for this purpose by turning the shaft 10 upon which the wheels 9 are mounted, by means of a bar 10 on the shaft 10. I provide a pawl and ratchet 2 1 of the usual construction on the shaft 10 and bar 10 for the purpose of facilitating this operation; The trays 17 are fed into the device to its capacity, as above described.

The shaft 5 carrying the fans 6 is rotated by means of a pulley 25 and belt 26.

or in any desired manner, whereby the heated air supplied to the device preferably under pressure from any suitable source of supply, through the hot air duct 27' and discharged through a screen mesh 28 preferably provided at the inner mouth of the duct 27 below the bafiie plate 28 will be progressively drawn into the bells or ducts 8 and expelled by the fans 6 upon and between the threads of spirally disposed trays 17 as indicated by the arrows in Fig. 1 whereby the heated air is distributed to all parts of the device, and is thereby brought into intimate contact, at high velocity with all drying surfaces thereby accomplishing with a minimum supply of heated air a maximum and uniform drying effect.

Having thus described my invention, what I claim is:

1. In a device of the character described, a shell, a spiral track therein, trays adapted to travel on said track, a fan set in the vertical core of the said spiral track and a 2. In a device of the character described,

a shell, a spiral track therein, means for conveying a substance to be dried along said track, a fan set in the vertical core of the said spiral track and a baflle plate arranged above said fan, substantially as shown and described.

3. In a device of the character described, a shell, a spiral track, therein, surrounding a vertical core, a fan in the said vertical core, intermediate the ends of said core, substantially as shown and described.

4:. In a device of the character described,

' a shell, a spiral track therein, means for conveying a substance to be dried along said track, a fan set in the vertical core, of said spiral track, a baffle plate above said fan and a bell below said fan, substantially as shown and described.

5. In a device of the character described, the combination of a shell, a spiral track therein, trays adapted to travel on said track, a vertical shaft adjacent said shell, horizontal Wheels mounted on said shaft and adapted to frictionally engage the sides of said trays substantially as shown and described.

6. In a device of the character described,

the combination of a shell, a spiral track therein, trays adapted to travel on said track, a vertical shaft adjacent said shell,

' wheels mounted on said vertical shaft and BURT s. HARRISON.

Copies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents, Washington, D. C. 

